refactor: split pilot architecture

Remove the obsolete dashboard now that Langfuse is the analytics surface.\nIntroduce focused transport, model, and configuration modules while preserving the ai_review facade, and document the current runtime architecture.

README.md

@@ -35,9 +35,9 @@ code never has to leave your network.
 
 ## Status
 
-A **pilot** is live and reviewing real PRs. The full framework (`pragent init`,
-tiering as code, analyzer fan-out, `explain` / `replay`) is designed but not
-built — see [`docs/plans/`](docs/plans/).
+A **pilot** is live and reviewing real PRs. The current runtime architecture is
+documented in [`docs/architecture.md`](docs/architecture.md); older framework
+plans remain in [`docs/plans/`](docs/plans/) as historical design material.
 
 What works today:
 
@@ -51,10 +51,12 @@ What works today:
 - `.pr-review.json` for per-repo focus and house rules (also the opt-in flag)
 - token-usage reporting on every review, measured from opencode `step_finish`
   events
+- Langfuse traces, equivalent-cost reporting, evaluation scores, and feedback
+  harvesting
 - containment against hostile PR content (see [Security](#security))
 
 Not yet: status checks, fail-close, attention tiering enforced in code (it is
-currently a skill the agent follows), multi-model routing.
+currently a skill the agent follows), multi-model routing, and a CLI framework.
 
 ## How a review runs
 
@@ -94,9 +96,8 @@ path is in [`pilot/README.md`](pilot/README.md).
 The model endpoint is supplied at runtime via `PRAGENT_MODEL_BASE_URL`; the
 committed `opencode.json` carries a placeholder.
 
-Per-review token spend, latency and equivalent cost are shipped to a
-self-hosted Langfuse, split into `ollama` and `claude` environments so the two
-spend stories stay separate: [`pilot/README-langfuse.md`](pilot/README-langfuse.md).
+Per-review token spend, latency, equivalent cost, and evaluation scores are
+shipped to a self-hosted Langfuse: [`pilot/README-langfuse.md`](pilot/README-langfuse.md).
 Emission is a silent no-op unless `LANGFUSE_HOST` and the key pair are set.
 
 ## Extending it
@@ -175,7 +176,7 @@ python3 pilot/cost_model.py --help      # other mixes, volumes, models
 ## Development
 
 ```bash
-python3 -m pytest tests -q    # 137 tests, stdlib only, no network
+python3 -m pytest tests -q    # stdlib-only tests, no network
 ```
 
 The pilot is stdlib-only Python by design — it runs from a bare `python:slim`